Dell PowerVault E03J Series Hardware Owner's Manual page 40

3 Remove the Velcro straps that secure the power cable and then disconnect
the power cable from the power supply/cooling fan module.
WARNING:
while removing the module.
4 Press the release tab and pull the power supply out of the chassis.
Figure 3-9. Removing and Installing a Power Supply/Cooling Fan Module
1 power supply
3 power supply handle
40
Installing Enclosure Components
The power supply/cooling fan modules are heavy. Use both hands
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2 release tab
1
2
3